MCP4231-103E/SL Microchip Technology, MCP4231-103E/SL Datasheet - Page 38
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MCP4231-103E/SL
Manufacturer Part Number
MCP4231-103E/SL
Description
IC DGTL POT 10K 2CH 14SOIC
Manufacturer
Microchip Technology
Specifications of MCP4231-103E/SL
Package / Case
14-SOIC (3.9mm Width), 14-SOL
Taps
129
Resistance (ohms)
10K
Number Of Circuits
2
Temperature Coefficient
150 ppm/°C Typical
Memory Type
Volatile
Interface
SPI Serial
Voltage - Supply
1.8 V ~ 5.5 V
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Resistance In Ohms
10K
Number Of Pots
Dual
Taps Per Pot
128
Resistance
10 KOhms
Wiper Memory
Volatile
Digital Interface
Serial (SPI)
Operating Supply Voltage
2.5 V or 3.3 V or 5 V
Supply Current
1 mA
Maximum Operating Temperature
+ 125 C
Minimum Operating Temperature
- 40 C
Mounting Style
SMD/SMT
Supply Voltage (max)
5.5 V
Supply Voltage (min)
1.8 V
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Lead Free Status / RoHS Status
Lead free / RoHS Compliant, Lead free / RoHS Compliant
Other names
MCP4231-103-E/SL
MCP4231-103-E/SL
MCP4231-103-E/SL
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
MCP4231-103E/SL
Manufacturer:
Microchip
Quantity:
671
MCP413X/415X/423X/425X
5.2
Each tap point (between the R
connection point for an analog switch. The opposite
side of the analog switch is connected to a common
signal which is connected to the Terminal W (Wiper)
pin.
A value in the volatile wiper register selects which
analog switch to close, connecting the W terminal to
the selected node of the resistor ladder.
The wiper can connect directly to Terminal B or to
Terminal A. A zero-scale connections, connects the
Terminal W (wiper) to Terminal B (wiper setting of
000h). A full-scale connections, connects the Terminal
W (wiper) to Terminal A (wiper setting of 100h or 80h).
In these configurations the only resistance between the
Terminal W and the other Terminal (A or B) is that of the
analog switches.
A wiper setting value greater than full-scale (wiper
setting of 100h for 8-bit device or 80h for 7-bit devices)
will also be a Full-Scale setting (Terminal W (wiper)
connected to Terminal A).
wiper setting map.
Equation 5-2
mine the resistance between the wiper and terminal B.
EQUATION 5-2:
TABLE 5-1:
DS22060B-page 38
7-bit Pot 8-bit Pot
3FFh
081h
080h
07Fh
041h
040h
03Fh
001h
000h
Wiper Setting
N = 0 to 256 (decimal)
N = 0 to 128 (decimal)
R
R
Wiper
WB
WB
=
=
illustrates the calculation used to deter-
3FFh
0FFh
101h
100h
080h
07Fh
000h
081
001
R
------------- -
(
R
------------- -
(
256
128
AB
AB
VOLATILE WIPER VALUE VS.
WIPER POSITION MAP
N
N
)
)
+
+
R
Reserved (Full-Scale (W = A)),
Increment and Decrement
commands ignored
Full-Scale (W = A),
Increment commands ignored
W = N
W = N (Mid-Scale)
W = N
Zero Scale (W = B)
Decrement command ignored
WB
R
R
W
W
Table 5-1
CALCULATION
Properties
8-bit Device
7-bit Device
S
illustrates the full
resistors) is a
A POR/BOR event will load the Volatile Wiper register
value with the default value.
default values offered. Custom POR/BOR options are
available. Contact the local Microchip Sales Office.
TABLE 5-2:
-502
-103
-503
-104
100.0 kΩ
10.0 kΩ
50.0 kΩ
5.0 kΩ
DEFAULT FACTORY
SETTINGS SELECTION
© 2008 Microchip Technology Inc.
Mid-scale
Mid-scale
Mid-scale
Mid-scale
Table 5-2
8-bit
Wiper Code
80h
80h
80h
80h
shows the
7-bit
40h
40h
40h
40h